The major advantage of using parallel strings is that a number of LED modules can be powered by a single power supply. In parallel circuits, the output voltage remains the same among all LED modules. Thus a constant voltage power supply can operate a large number of LED modules or light fixtures as long as the total output power remains within the limit of the maximum current that can be supplied. This feature gives designers great flexibility with respect to the number of modules or fixtures to be connected to the power supply. The use of a CV driver as a remote-mounted power supply substantially reduces power supply cost and eliminates the need for additional spaces or housings to accommodate the bulky power supplies. As a result, architectural lighting systems can be made with a very slim form factor and seamlessly integrated into various structures. This type of lighting systems includes cove lights, linear lighting profiles, and undercabinet lights which generally use LED tape lights as the light sources.
All constant voltage LED power supplies meet the safety extra low voltage (SELV) and the Underwriters Laboratories (UL) Class 2 requirements which define that no touchable conducting parts of an electrical system have a voltage (relative to ground, or across any two points) above 60 V DC, or 42.4 V AC. This feature makes CV drivers the mainstream power supply solution for the low voltage landscape lighting market.
